How to write a formal letter on any topic

Which statement best reflects how martin luther king, jr. uses rhetoric and style in paragraph 9 of "letter from a birmingham jail" to assist him in advocating the use of nonviolent direct action to achieve justice for negro citizens in birmingham? click here to read the letter.

In the following conversation, which group discussion technique does emily most clearly show?

Experiments were conducted to try to teach chimpanzees sign language